Keyboard



FIG. 1 is a perspective view showing the front, top and left sides of the keyboard;

FIG. 2 is a top plan view of the keyboard;

FIG. 3 is a front elevation view of the keyboard;

FIG. 4 is a rear elevation view of the keyboard;

FIG. 5 is a left side elevation view of the keyboard; and,

FIG. 6 is a right side elevation view of the keyboard.

The bottom surface of the keyboard, which is not shown in the drawing disclosure, is flat and devoid of surface ornamentation and does not form part of the claimed design.

The broken lines shown in the drawings represent portions of the keyboard that form no part of the claimed design. 

CLAIM The ornamental design for a keyboard, as shown and described. 